lounsbury



Feb. 26, 192 9.

H. J. LOUNSBURY FRICTION SHOCK ABSORBING MECHANISM Originpl Filed July 5, 19 27 2 Sheets-Sheet 1 Feb. 26, 1929.

I H. J. LOUN-SBURY FRICTION SHOCK ABSORBING MECHANISM 2 Sheets-Sheet 2 Original Filed July 5, 1927 A 5 {51 f5 a 1 1.7 WW0? V w v v o In! llllllllhllllll 129% j fl A77 lllllllllllllllllll Patented Feb. 26, 1929.

UNITED STATES PATENT OFFICE.

HARVEY J'. LOUNSBURY, OF GLEN ELLYN, ILLINOIS, ASSIGNOR TO W. H. MINER, INC., 013' CHICAGO, ILLINOIS, A CORPORATION OF DELAWARE.

FRICTION SHOCK-ABSORBING MECHANISM.

Application filed Ju1y 5, 1927, Serial No. 203,498.

This invention relates to improvements in friction shock absorbing inr-zchanisn'ls.

One object of the invention is to provide a friction shock absorbing mechanism especially adapted for railway draft riggings, ineluding a combined friction shell and spring cage, wherein the friction shell is provided with detachable liners with which frict on means co-operates, the arrangement being such that the friction means is confined to movement in a direction lengtlnvise of the mechanism to maintain the friction means out of contact with the inactive surfaces of the friction shell. portion 016' the cage in order to prevent wear the same and prolong the life of the mechanism.

. Another object of the invention is to pro: vide a friction shock absorbing mechanism of the character indicated including a casing provided with detachable liners at one end thereof presenting interior friction surfaces, a friction wedge system co-operatmg wlth the liners and spring resistance means opposing relative movcn'ien't of the friction means and the casing wherein the co-operating parts of the friction svstcin and the liners and the casing are o designed as to confine movement of the :..1ction system to a direction long1- tudinal of the mechanism and maintain the liners against displacement, thereby preventing engagement of the active parts the friction system and the non-active SLH'THQQS of the casing to eliminate wear of the parts.

A still further object of the invention is to provide friction shock absorbing mecha nism especially adapted for railwav draft 1 gings, including a spring cage provided at one end thereof with detachable liners presenting interior frictionsurfaces and defining a friction shell, :1 spring resistance means within the cage co-operating with the friction means of the incchanisu'i wncrcin the spring age is open at one end only and all the walls thereof are substantially solid to provide the maximum column strength, and the s iring resistance means 1s so designed and arranged as to occupy the maximum available s 'iring space thereby obtaining exceptionally high spring and combined spring and frictional capacity.

Yet another object of the invention 1s to provide a friction shock absorbing mechanism of the character indicated, includmg; a casing open at one end only and having all Renewed July 19, 1928.

of the walls thereof solid enclosing a spring resistance means composed of a centrally arranged relatively heavy spring element and four relatively lighter spring elements disposed in pairs at opposite sides of the mechanism; friction means at the open end of the casing con'iprising detachable liners presenting interior friction surfaces; a friction system co-operating with the shell; and a spring follower co-operating with the outer springs, the follower being provided with an opening through which the central spring extends the central spring directly co-operating with the friction system and outward movement of the spring follower being limited by engagement with abutment means on the liners.

Other and further. objects and advantages of the invention will more fully and clearly appear from the description and claims hereinafter following.

In the drawings, forn'iing a part of this specification, Figure 1, is a horizontal, longitudinal, sectional view of a railway draft rigging showing my improvements in connection therewith. Figure 2 is a front end elevational view of the shock absorbing mechanism proper. Figure 3 is a transverse vertical sectional view of the shock absorbing mechanism proper corresponding substantially to the line 33 of Figure 1. Figure 4 is a vertical transverse sectional view corresponding substantially to the line 4-4 of Figure 1. And Figures 5 and 6 are detailed perspective views, respectively of a friction shoe and the wedge block employed in connection with my improved mechanism.

In said drawings, 10l0 indicate channelshaped center or draft sills of a railway car undcrframe, to the inner sides of which are secured. the usual front stop lugs 111.1 and rear stop lugs 12l2. The inner end of the drawbar is designated by 13, to which is opcrai'ivcly connected a yoke 14; of well known form. The shock absorbing mechanism proper, as well as a. front main follower 15 are disposed within the yoke, and the yoke and the parts supported therewithin are maintained in operative position by a detachable saddle plate 16, secured to the draft sills.

My improved shock absorbing mechanism proper comprises broadly a casing A, provided with interior liners BB; a main wedge C, two friction shoes D and E; a

spring resistance F; a spring follower G; a

w l and a retainer l7, (no-operates with stop lugs 12 in the n'innncr ot usual rear follower. At the lorwnrd end tl The end wall side walls 19 are inwz rdly enlarged or thin r cued as indicated at 20. 'llhe side walls oi th using; are also provided with interior len ludinnlljy extending cei'itrnlly disposed ire-e forcing ribs ill, renrwnrdy oi the enhir portions of the side walls. As most clearly sho vn in l snre l, the lop L ind bottom Walls 18 of the c; sing are p-rovioed with interior longiludinnlly exit-ruling pochcblilqe serr- (ions 2: 3 at the opposite sidestheiveoi to receive he oorrcsponding side no.v i the outer coils of the spring resistance means. That portion of the cos renrwnrdly of the enlarged s ictions '20 ot (he -iide \nlls defines the spring cage poi the casing. The liners l whicl are two in nunil are in the form oi relatively heavy plate-like members. Each. liner ll provided Will; a iliiGlill. enlargement- 23 having a room .d tr re :i s most. clearly shown in lii g'ure 3 t section 23 hein iz seated in :1 pocket 24: 11 vided in section of th corresponding wall of the ensii As will be evident enlarged portion 23 of the liner which IS ed in the pocket 2% secures the li" 21;;

V linst longitudinn. movement i ith respect to the 'easing when the parts of the n'ieehnnis n are assembled. )n the inner side each liner B is provided with a longitudinally extending t .tion snrtnai oi Vrshnped torn]. most. clearly shown in Figure 1, the opposed V-shnped friction surfaces 25 of the liners ll eonver e inwardly of. the mechanism. Upon the r i rence tol igi'ures 2 and 3 it will be seen that the err: ll are of such an over- :ill height as to :n'ihstnnl-iully fit between the top and hottein wells 18 of the (H.Flllfl'. herchy preventine' diso eminent thereof r ideally. The linei 4 l) tng'cliier with the forward tions of the t in and hottom walls :8 ol' the cssing define the friction shell section oi" the mechanism.

htlv cu ziriu g snrlnce outer end tl ado}. i to c the inner side 0 I t he follower 5.

new

n'ov dcd with u wedge "face 28 is disposed at a relatively keen wed ing angle with respectto snid axis as in nrly illustrated in Figure 'l. The iriction shoes D and E are at oprosite sides oi the mechanism ing; .erpesed between the wedge and the liner l3 at the correspondii 7 side ol the mechanism. The two friction shoes I) and E are of similar design except as nereinulter pointed out. Each oi the shoes is provided with a longitudinally extending; friction sn'ince on the enter side thereol roopo nting with the friction snnnce A5 of the liner ll. he iillL in surface is of J'- sl-niped section so as to inter-lit with the trio.-

disposed catch behlocli C tion snrin e 2?. On the inner side enci'i shoe is laterally enlarged as indicated at 9. lhe enlargement- 29 is provnled with an order llnisni, 'lne wedge l l L noted h 127 and ti o wedge face o't' the A if hv litw. l

l he races Si) ZlS LU "ending; wedge feces block i irly shown in Figure. 1, t wea i'zrce 12? is (in;-

1x 0+ xlut lwbli 'r] t -1 D0411 M Li ice in v Kalle an; e so as o prop ir v (:o-opernte nth the hlnnt :1 re 22' o the w block C while the wet ace 128 is disposed at u relatively keen wedglng angle so as to co-onerate properly with ho w fince of said wedge block. B t 10 arre ment of 'v-c-ihaned inter-ennngrinr' ores o.

1 1 1 l 1 J 4 wuig e olocK C and shoe shaped intmengeging surfaces on D and E and lillil'S l), movement oi hers OJ) and E is restricted to n l()11gltllti1l1lll' oi the niechnnisn'i.

The spring resistance means 1* comprises n plurality of elements so n run die n lldirection :py substantially the entire K the casing. As most clearly she n '1 Fri:-

nres l and at the spring; resistance eludes a central springelement 5h) at relatively light inner coil and outer coil. The remain 4 spring resistance F surround or about the central element 30, the? such spring resistinice ch en'ts, cnca lr-cing lo water in one oF ine corners of ing. Illnch of the lill" nnnied chides n relatively llfjfilt x-er coi icr rmterroil the outer csi mine; 1'. the z ll-er than the A l Jenn! 5 element ill) have the end of the casing A. and their .1 ront ends om 11 on the spring; follower "(l which is inter between these spring elen'ients and the f tion shoes I) and E.

The spring follow 1' G comprises a rel tively heavy plate-like section h hi med portion 32 projecting therefrom. Ae most cleerly shown in Figure 1 the heavy platelike section is provided with or central opening; 33 which i3 continuoi" with the opehif' of the cylindrical. siceve-Ll'e section Tl spring follower G is of such :2 width that the plate-like section 3'.

the l inels; ii, thus hi1 oi. the SPIiD thespring;

i a size as loosely accommodate the outer coil oi ti c spring); element 30. ilhe spring ciemeht iii, as clearly shown in Figure t end section thereof extent to spring follower (i a f? H being interposed between and the enlzirgg eii'ie shoes 1) anti l), The inn rcsienince 3O hen-re on it \vzirdly pro }ecting from and 1,. with the end. well 17 oi? the (it outer coil of element PM) h hoes while t the end oi one 7 the inner coil l'B-CERIS on u c rizizlsmil l I y has the head thereof and core llow hoes 2'31: and he nut the o J- thereof ciisposeii witli i'OViLlOLl in the wedge hl-ocl; C. the mechanism i al rhic V ii wimtcai that the rap element 31) c under liltlfil. coin resie ren'iziini' spring elements of the I -csisatzince F else so proportioned ,y are nncler initial coinpres ion w 1e: in assen'ihieil relation with the other of the mechanism.

Compensation for wear of the various friction and we 1 e faces haul by the expansive :2. itiorii of the spring; rc' once element 30 which as hcreinheii ore pointed out is normally under initial coniprefieion. The tendency of the s rie element 30 to expand. will urge the ioh wheeze l) c it (i it outwardly t ins hohlin the smile in com e faces of the block 0 and the if; ,ctioii sniff oi: the iinors wear of place.

The awerntioh oi" my improved shock cheorhho; mochm ir-mi EZSNUHiilQ cozhprw mion A: ole i:-1::: Folio-we:

iho hmin 'ioiZv-wei is? 7 coming i i will he niovwi rchiiire y i v'; i

i D and hereby forcing the with il 1 friction in :uihli ii. the will he ca ed inwardly at the mechanism during the inward movement oi the wedge block C sliding on the friction surfaces of the liners thereby YiGLiHCillg high :l'rictionul resistance. Inward. movement of the friction shoes ei'l'ectrs coinpreesioii oi the 'pring resistance F, the spring lQSiStJECQ element 30 being compressed inclepenclenti of the 1(3i '1i ,]i 'ig sprino resistt, and the lacter elements: heing con'iprc :o thr;

igh the me- O actuated i The described action will contiime e t'ner until. ti e actuatinsr force is rrxincezi or inward movement of the follower o 1e by engagement with the forward enl of the casing. Upon engagement oi the toll r 15 with the casing, the actiiietiiig i he illtnffil'fiitififi directly through i the latter acting its a column eleieving the springs from undue cointhe actuating torceis reduced, in see, the spring resii-xtonce F wiil err-y ,7 i-ictien shecsontwz rdi: \;,tl1el i er turn ii znicihg; the

wedge hie cl; C outwei'ifily ziiso Hlli'li movement oi the letter is positively iiihitc'i h the retainer bolt J.

ziroih the foregoing description taken in co i iii in with the drawings, it will he evido I have provided. an exceezhngziy f5lllll: 1* i o'o 'iczir i" l3 1 an} ii/JIM 111 mo ha eoio aginec iinimnih z-qceptiormi y high capacity having great column sirei h wherein the maximum 2: nount oi sp ng space available is ntil'zaecl to make poisiole the use of high capacity "ing means, wherein the friction surface" ii the mechanism and especially thece oi fiction shell section thereoi are readily reiewohle to take care of wear and wherein the novzihle friction system is maintained out i contact with o the inactive surfaces oi' the trietlon eiieli to prevent undue wear 0." parts, thereby adding greatly to the lie 1m hechanisi'n.

hiie l have herein shown and described wlr .l now consider the preferred. manner o; carrying out my invention, the some is merely 11h "UVG, anal l conieiiiplete aii char w and modifications that con-1e within h n a i n l "1" 1 n". "I h -rizm ch cccpc 0.. he e cum appiht e eicw.

riclh i hp; with the liners; wedge pressure transmitting means can .i 1i spring follower through central member of the spring ex:

heing interposed lictween the ehoee and the spring ineinhers disposed about said central member.

2. In a "friction shock absorbing mechanism, the combination with asplin cage having oapesed \Vililf said cage being open limiting ii'ioven'ient oi": the Wedge and shoes atone end only; 0*" I i to a direction .lO1gi l1"2SQ oi? the mechanism,

to the. s id sent-ing shoes (o-o transiz-iit i went with said shoes having fri tion s irfaces inter-engziiging Wit inc '0 i r V 1 aces oi the liners and lin said shoes to a d nechanisi'n; spring ity of spring resistance out said spring resistinoven; ans for transnnttmg the an dv lotion shock absorbing mechatie eoinhin: on with a casing having;- inuons to, ho tom and side Walls ssv'd being open a one end only; 0.1 a pair i detach ably connected to the opposed oils ()1 the cesirq, said liners being ainstvertical d iceinent by said ,1' deleting a so .onal sin men and bottom walls, said liners together lower a 'h said top and bottom Walls defining a secti 3. In aosorhing: and said casing rearc ion With a spring n shell, section forming open at one end; oi l achableiine "s secured in Wedge block a pair of to opposed Well .0115: of aid c it. the posed between the Wedge ooen end thereof, t id liners def h id shoes and Wedge block the remaining wah portions 0L th a Wedge faces of V- :triction shell means at sad open ench c lshoes and liners havliners heing confined ag-inst (liSPllCGiDQD' cgine "friction surfaces of V- by said remaining Wall portions; a we tionj an d swing re oce in he opposing inward inovenient id shoesv :1 frict on shock absorbing nech; he coinh'nrtion with a spring cage 1 top, bottom and si le 9.

open at one end only; red to said side Walls ers presenting opposed E'iction surfaces; a pair having; V-shaped friction "no; With said liner tricpressure transmitting ineii'ihei, s id nien'ihe and cage being relatively movable towart d away "from each. other; a pair tion shoes interposed between the W the liners, said Wedge and shoes having engaging Wedge faces limiting inoventhe Wedge and shoes to a direction len of the inechani .1, said shoes having sin-faces inter-eng th friction sii th liners and iinntin movement 0 s shoes to a direction len unwise of the a spring resistance .ns opposing inoven'ientof said shoes a plurality of s resistance elements disposed about snrir" means; and a sprin lower through which said soi a n d ance ii'ieans cz t I spring 1 being; in, r :W'QGD the shoes a spring r s stunc' is end havi r Q11?!) 3; outward said ea i l hers.

4. In a friction shock spring! resistance ele .ly the entire open at one ewe; to opposed wail. 1 pressure transmit I noer; friction shoes in act-posed between pressure iii'flllfiliii:iinj said wedge p 'essure t and shoes having inter-enga 4 ac, i :ibie l 

